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  vue-property-decorator的简单使用
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  <h2 id="vue-property-decorator"><a href="#vue-property-decorator" class="headerlink" title="vue-property-decorator"></a><a target="_blank" rel="noopener" href="https://github.com/kaorun343/vue-property-decorator">vue-property-decorator</a></h2><blockquote>
<p>提供给vue内写typescript语法的时候引入的组件（基于vue-class-component）  </p>
</blockquote>
<h2 id="安装"><a href="#安装" class="headerlink" title="安装"></a>安装</h2><blockquote>
<p>npm i -s vue-property-decorator</p>
</blockquote>
<h2 id="基本语法"><a href="#基本语法" class="headerlink" title="基本语法"></a>基本语法</h2><h3 id="Props"><a href="#Props" class="headerlink" title="@Props"></a>@Props</h3><blockquote>
<p>props是子组件用来接收父组件传递过来的参数  </p>
</blockquote>
<p>在常规的vue语法环境下的书写方式：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> &#123;</span><br><span class="line">    props: &#123;</span><br><span class="line">        propA: &#123;</span><br><span class="line">            type: <span class="built_in">Number</span>,</span><br><span class="line">            <span class="comment">// type: [ String,Boolean ]</span></span><br><span class="line">            <span class="comment">// default: &#x27;value&#x27;</span></span><br><span class="line">            <span class="comment">// default: function ()&#123; return &#x27;hello&#x27; &#125;</span></span><br><span class="line">            <span class="comment">// required: true</span></span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<br/>
<br/>
在vue-property-decorator组件中使用：  

<blockquote>
<p>@Prop( options: (PropOptions | Constructor[] | Constructor )={} )  </p>
</blockquote>
<p><code>@Prop</code>装饰器接收一个参数，这个参数的三种写法：  </p>
<ul>
<li><code>constructor</code> String、Number、Boolean等，指定prop的类型</li>
<li><code>constructor[]</code> 指定prop的可选类型</li>
<li><code>propOptions</code> 对象参数可以是 type，default，required…</li>
</ul>
<figure class="highlight typescript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">&lt;script lang=<span class="string">&#x27;ts&#x27;</span>&gt;</span><br><span class="line">    <span class="keyword">import</span> &#123; Vue,Component,Prop &#125; <span class="keyword">from</span> <span class="string">&#x27;vue-property-decorator&#x27;</span></span><br><span class="line"></span><br><span class="line">    <span class="meta">@Component</span>(&#123;&#125;) <span class="comment">// 不管有没有组件都必须写</span></span><br><span class="line">    <span class="keyword">export</span> <span class="keyword">default</span> <span class="keyword">class</span> 组件名 <span class="keyword">extends</span> Vue&#123;</span><br><span class="line"></span><br><span class="line">        <span class="meta">@Props</span>(<span class="built_in">Number</span>) propA!: <span class="built_in">number</span>;</span><br><span class="line">        <span class="meta">@Props</span>([<span class="built_in">String</span>,<span class="built_in">Boolean</span>]) propB: <span class="built_in">string</span> | <span class="built_in">boolean</span>;</span><br><span class="line">        <span class="meta">@Props</span>(&#123;<span class="keyword">default</span>:<span class="string">&#x27;value&#x27;</span>&#125;) propC!: <span class="built_in">string</span>;</span><br><span class="line"></span><br><span class="line">    &#125;</span><br><span class="line">&lt;/script&gt;</span><br></pre></td></tr></table></figure>
<blockquote>
<p><code>!</code> 表示一定有值(非<code>null</code>和非<code>undefined</code>)， <code>?</code> 表示可选  </p>
</blockquote>
<h3 id="Component"><a href="#Component" class="headerlink" title="@Component"></a>@Component</h3><blockquote>
<p>用来接收一个对象作为参数，在对象中可以声明<code>components,filters,directives</code>等，也可以声明<code>computed,watch</code>等  </p>
</blockquote>
<p>在常规的vue语法环境下的书写方式：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> DetailTable <span class="keyword">from</span> <span class="string">&#x27;./components/detail-table.vue&#x27;</span>;</span><br><span class="line"></span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> &#123;</span><br><span class="line">    components: &#123;</span><br><span class="line">        DetailTable</span><br><span class="line">    &#125;,</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<br/>
<br/>
在vue-property-decorator组件中使用： 

<blockquote>
<p>Component( options:ComponentOptions = {} ) </p>
</blockquote>
<figure class="highlight typescript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> DetailTable <span class="keyword">from</span> <span class="string">&#x27;./components/detail-table.vue&#x27;</span>;</span><br><span class="line"><span class="comment">// ... </span></span><br><span class="line"><span class="meta">@Component</span>(&#123;</span><br><span class="line">    components:&#123;</span><br><span class="line">        DetailTable</span><br><span class="line">    &#125;,</span><br><span class="line">    filters: &#123;</span><br><span class="line">        toFixed: <span class="function">()=&gt;</span>&#123; ... &#125;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;)</span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> <span class="keyword">class</span> 组件名 <span class="keyword">extends</span> Vue &#123;</span><br><span class="line">    <span class="comment">// ... </span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h3 id="Watch"><a href="#Watch" class="headerlink" title="@Watch"></a>@Watch</h3><blockquote>
<p>侦听数据的变化  </p>
</blockquote>
<p>在常规的vue语法环境下的书写方式：  </p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">watch: &#123;</span><br><span class="line">    msg: [</span><br><span class="line">        &#123;</span><br><span class="line">            handler: <span class="string">&#x27;onMsgChange&#x27;</span>,</span><br><span class="line">            immediate: <span class="literal">false</span>,</span><br><span class="line">            deep: <span class="literal">false</span></span><br><span class="line">        &#125;</span><br><span class="line">    ]</span><br><span class="line">  &#125;,</span><br><span class="line">  methods: &#123;</span><br><span class="line">      onMsgChange(newValue,oldValue) &#123; &#125;</span><br><span class="line">  &#125;</span><br><span class="line"></span><br></pre></td></tr></table></figure>

<p>在vue-property-decorator组件中使用：  </p>
<blockquote>
<p>@Watch( path: string, options: WatchOptions={} )  </p>
</blockquote>
<p><code>@Watch</code>装饰器接收两个参数：  </p>
<ul>
<li><code>path：string</code> 被侦听的属性名</li>
<li><code>options?: WatchOptions=&#123;&#125; options</code> 可以包含两个属性：<ul>
<li><code>immediate?: boolean</code> 侦听开始之后是否立即调用该回调函数；</li>
<li><code>deep?: boolean</code> 被侦听的对象的属性被改变时，是否调用该回调函数；<figure class="highlight typescript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> <span class="keyword">class</span> 组件名 <span class="keyword">extends</span> Vue &#123;</span><br><span class="line">    <span class="meta">@Watch</span>(<span class="string">&#x27;msg&#x27;</span>)</span><br><span class="line">    <span class="keyword">public</span> onMsgChange (newValue: <span class="built_in">string</span>, oldValue: <span class="built_in">string</span>) &#123;</span><br><span class="line">        <span class="comment">// ... </span></span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

</li>
</ul>
</li>
</ul>
<h2 id="Emit"><a href="#Emit" class="headerlink" title="@Emit"></a>@Emit</h2><blockquote>
<p>广播方法获取变量</p>
</blockquote>
<p>在常规的vue语法环境下的书写方式：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> &#123;</span><br><span class="line">    data ()&#123;</span><br><span class="line">        count: <span class="number">0</span></span><br><span class="line">    &#125;,</span><br><span class="line">    methods: &#123;</span><br><span class="line">        addToCount(n) &#123;</span><br><span class="line">            <span class="built_in">this</span>.count += n</span><br><span class="line">            <span class="built_in">this</span>.$emit(<span class="string">&#x27;add-to-count&#x27;</span>,n)</span><br><span class="line">        &#125;,</span><br><span class="line">        resetCount() &#123;</span><br><span class="line">            <span class="built_in">this</span>.count = <span class="number">0</span></span><br><span class="line">            <span class="built_in">this</span>.$emit(<span class="string">&#x27;reset&#x27;</span>)</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<blockquote>
<p>@Emit(event?:string) </p>
</blockquote>
<p><code>@Emit</code>装饰器接收一个可选参数，作为事件名<br><code>@Emit</code>将回调函数的返回值作为第二个参数  </p>
<figure class="highlight typescript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> <span class="keyword">class</span> 组件名 <span class="keyword">extends</span> Vue&#123;</span><br><span class="line">    count = <span class="number">0</span></span><br><span class="line">    </span><br><span class="line">    <span class="meta">@Emit</span>()</span><br><span class="line">    <span class="keyword">public</span> addToCount(n:<span class="built_in">number</span>)&#123;</span><br><span class="line">        <span class="built_in">this</span>.count += n</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Emit</span>(<span class="string">&#x27;reset&#x27;</span>)</span><br><span class="line">    <span class="keyword">public</span> resetCount() &#123;</span><br><span class="line">        <span class="built_in">this</span>.count = <span class="number">0</span></span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>


 
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  <p class="reward-p"><i class="ri-cup-line"></i>请我喝杯咖啡吧~</p>
  <div class="reward-box">
    
    <div class="reward-item">
      <img class="reward-img" src="https://cdn.jsdelivr.net/gh/Shen-Yu/cdn/img/alipay.jpg">
      <span class="reward-type">支付宝</span>
    </div>
    
    
    <div class="reward-item">
      <img class="reward-img" src="https://cdn.jsdelivr.net/gh/Shen-Yu/cdn/img/wechat.jpg">
      <span class="reward-type">微信</span>
    </div>
    
  </div>
</div>
    
<script src="/js/jquery-2.0.3.min.js"></script>


<script src="/js/lazyload.min.js"></script>

<!-- Tocbot -->


<script src="/js/tocbot.min.js"></script>

<script>
  tocbot.init({
    tocSelector: '.tocbot',
    contentSelector: '.article-entry',
    headingSelector: 'h1, h2, h3, h4, h5, h6',
    hasInnerContainers: true,
    scrollSmooth: true,
    scrollContainer: 'main',
    positionFixedSelector: '.tocbot',
    positionFixedClass: 'is-position-fixed',
    fixedSidebarOffset: 'auto'
  });
</script>

<script src="https://cdn.jsdelivr.net/npm/jquery-modal@0.9.2/jquery.modal.min.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/jquery-modal@0.9.2/jquery.modal.min.css">
<script src="https://cdn.jsdelivr.net/npm/justifiedGallery@3.7.0/dist/js/jquery.justifiedGallery.min.js"></script>

<script src="/dist/main.js"></script>

<!-- ImageViewer -->

<!-- Root element of PhotoSwipe. Must have class pswp. -->
<div class="pswp" tabindex="-1" role="dialog" aria-hidden="true">

    <!-- Background of PhotoSwipe. 
         It's a separate element as animating opacity is faster than rgba(). -->
    <div class="pswp__bg"></div>

    <!-- Slides wrapper with overflow:hidden. -->
    <div class="pswp__scroll-wrap">

        <!-- Container that holds slides. 
            PhotoSwipe keeps only 3 of them in the DOM to save memory.
            Don't modify these 3 pswp__item elements, data is added later on. -->
        <div class="pswp__container">
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
        </div>

        <!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. -->
        <div class="pswp__ui pswp__ui--hidden">

            <div class="pswp__top-bar">

                <!--  Controls are self-explanatory. Order can be changed. -->

                <div class="pswp__counter"></div>

                <button class="pswp__button pswp__button--close" title="Close (Esc)"></button>

                <button class="pswp__button pswp__button--share" style="display:none" title="Share"></button>

                <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button>

                <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>

                <!-- Preloader demo http://codepen.io/dimsemenov/pen/yyBWoR -->
                <!-- element will get class pswp__preloader--active when preloader is running -->
                <div class="pswp__preloader">
                    <div class="pswp__preloader__icn">
                        <div class="pswp__preloader__cut">
                            <div class="pswp__preloader__donut"></div>
                        </div>
                    </div>
                </div>
            </div>

            <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">
                <div class="pswp__share-tooltip"></div>
            </div>

            <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)">
            </button>

            <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)">
            </button>

            <div class="pswp__caption">
                <div class="pswp__caption__center"></div>
            </div>

        </div>

    </div>

</div>

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/photoswipe@4.1.3/dist/photoswipe.min.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/photoswipe@4.1.3/dist/default-skin/default-skin.min.css">
<script src="https://cdn.jsdelivr.net/npm/photoswipe@4.1.3/dist/photoswipe.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/photoswipe@4.1.3/dist/photoswipe-ui-default.min.js"></script>

<script>
    function viewer_init() {
        let pswpElement = document.querySelectorAll('.pswp')[0];
        let $imgArr = document.querySelectorAll(('.article-entry img:not(.reward-img)'))

        $imgArr.forEach(($em, i) => {
            $em.onclick = () => {
                // slider展开状态
                // todo: 这样不好，后面改成状态
                if (document.querySelector('.left-col.show')) return
                let items = []
                $imgArr.forEach(($em2, i2) => {
                    let img = $em2.getAttribute('data-idx', i2)
                    let src = $em2.getAttribute('data-target') || $em2.getAttribute('src')
                    let title = $em2.getAttribute('alt')
                    // 获得原图尺寸
                    const image = new Image()
                    image.src = src
                    items.push({
                        src: src,
                        w: image.width || $em2.width,
                        h: image.height || $em2.height,
                        title: title
                    })
                })
                var gallery = new PhotoSwipe(pswpElement, PhotoSwipeUI_Default, items, {
                    index: parseInt(i)
                });
                gallery.init()
            }
        })
    }
    viewer_init()
</script>

<!-- MathJax -->

<!-- Katex -->

<!-- busuanzi  -->


<script src="/js/busuanzi-2.3.pure.min.js"></script>


<!-- ClickLove -->

<!-- ClickBoom1 -->

<!-- ClickBoom2 -->


<script src="/js/clickBoom2.js"></script>


<!-- CodeCopy -->


<link rel="stylesheet" href="/css/clipboard.css">

<script src="https://cdn.jsdelivr.net/npm/clipboard@2/dist/clipboard.min.js"></script>
<script>
  function wait(callback, seconds) {
    var timelag = null;
    timelag = window.setTimeout(callback, seconds);
  }
  !function (e, t, a) {
    var initCopyCode = function(){
      var copyHtml = '';
      copyHtml += '<button class="btn-copy" data-clipboard-snippet="">';
      copyHtml += '<i class="ri-file-copy-2-line"></i><span>COPY</span>';
      copyHtml += '</button>';
      $(".highlight .code pre").before(copyHtml);
      $(".article pre code").before(copyHtml);
      var clipboard = new ClipboardJS('.btn-copy', {
        target: function(trigger) {
          return trigger.nextElementSibling;
        }
      });
      clipboard.on('success', function(e) {
        let $btn = $(e.trigger);
        $btn.addClass('copied');
        let $icon = $($btn.find('i'));
        $icon.removeClass('ri-file-copy-2-line');
        $icon.addClass('ri-checkbox-circle-line');
        let $span = $($btn.find('span'));
        $span[0].innerText = 'COPIED';
        
        wait(function () { // 等待两秒钟后恢复
          $icon.removeClass('ri-checkbox-circle-line');
          $icon.addClass('ri-file-copy-2-line');
          $span[0].innerText = 'COPY';
        }, 2000);
      });
      clipboard.on('error', function(e) {
        e.clearSelection();
        let $btn = $(e.trigger);
        $btn.addClass('copy-failed');
        let $icon = $($btn.find('i'));
        $icon.removeClass('ri-file-copy-2-line');
        $icon.addClass('ri-time-line');
        let $span = $($btn.find('span'));
        $span[0].innerText = 'COPY FAILED';
        
        wait(function () { // 等待两秒钟后恢复
          $icon.removeClass('ri-time-line');
          $icon.addClass('ri-file-copy-2-line');
          $span[0].innerText = 'COPY';
        }, 2000);
      });
    }
    initCopyCode();
  }(window, document);
</script>


<!-- CanvasBackground -->


<script src="/js/dz.js"></script>



    
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</body>

</html>